Chemistry Reference
In-Depth Information
4. [heterogeneous]—Sand is composed of particles of different substances,
mixed together in a non-uniform distribution.
5. [diatomic]—“Diatomic” means “two-atom,” so think of O
2
or H
2
when you
see it.
6. [B. gold]—Gold is an element, and elements can't be broken down into
simpler substances by ordinary chemical means.
7. [D. salad]—We toss a salad to try to make its composition more uniform,
but it never becomes truly uniform.
8. [B. He]—NO, CO, and MgS all represent compounds. We can tell because
they all contain more than one capital letter and, therefore, more than one
elemental symbol.
9. [D. NaCl
(aq)
]—The “(aq)” indicates that the salt has been dissolved in water,
making it a mixture of two or more substances physically combined.
10. [D. NaNO
2
]—A ternary compound contains three different elements.
Sodium nitrite (NaNO
2
) contains the elements sodium, nitrogen, and
oxygen, so it fits the definition.
Lesson 1-2 Review
1. [condensation]—If you go outside on a cool morning, you may find
condensation on many cool surfaces.
2. [vaporization]—The steam that you see coming from a teapot is the result
of vaporization.
3. [100
o
C or 373 K]—You will learn more about the Kelvin scale in Chapter 2.
4. [viscosity]—Liquids with a great deal of viscosity are very resistant to flow.
5. [sublimation]
6. [solids]—Solids don't take the shape and size of their containers.
7. [fusion]—The term fusion is also used for a nuclear process that we will
discuss in Chapter 6.
8. [deposition]—When water vapor “freezes” onto a cold surface, deposition
is taking place.
9. [solidification]—This is the process that we normally call “freezing.” Many
people associate the term “freezing” with “cold,” but the process of
solidification can happen at relatively high temperatures for some substances.
10. [crystalline]
Lesson 1-3 Review
1.
[extensive]—Think of the word extent.
2.
[malleability]
